private void btnStart_Click(object sender, EventArgs e) { bool isConnect = true; tbxReceivedData.Text = ""; try { tbxLocalIpAddress.Text = Regex.Replace(tbxLocalIpAddress.Text, @"[^0-9].[^0-9].[^0-9].[^0-9]", ""); tbxPort.Text = Regex.Replace(tbxPort.Text, @"[^0-9]", ""); if (tbxLocalIpAddress.Text == "" || tbxPort.Text == "") { throw new Exception(); } if (isConnect) { IPAddress serverIPAddress = IPAddress.Parse(tbxLocalIpAddress.Text.Trim()); IPEndPoint serverEndPoint = new IPEndPoint(serverIPAddress, Int32.Parse(tbxPort.Text)); _connectSocket = serverEvent.SetupSocket(); _connectSocket.Bind(serverEndPoint); _connectSocket.Listen(1); ThreadStart threadDelegate = new ThreadStart(ReceiveDataThread); Thread playThread = new Thread(threadDelegate); playThread.Start(); } } catch { MessageBox.Show("Local IP Address 또는 Port 번호가 올바르지 않습니다."); isConnect = false; } if (isConnect == true) { ButtonStatusChange(); } }